ceph/src/boost/tools/build/src/engine/scan.h

   1 /*
   2  * Copyright 1993, 1995 Christopher Seiwald.
   3  *
   4  * This file is part of Jam - see jam.c for Copyright information.
   5  */
   6
   7 /*
   8  * scan.h - the jam yacc scanner
   9  *
  10  * External functions:
  11  *  yyerror( char *s ) - print a parsing error message.
  12  *  yyfparse( char *s ) - scan include file s.
  13  *  yylex() - parse the next token, returning its type.
  14  *  yymode() - adjust lexicon of scanner.
  15  *  yyparse() - declaration for yacc parser.
  16  *  yyanyerrors() - indicate if any parsing errors occured.
  17  *
  18  * The yymode() function is for the parser to adjust the lexicon of the scanner.
  19  * Aside from normal keyword scanning, there is a mode to handle action strings
  20  * (look only for the closing }) and a mode to ignore most keywords when looking
  21  * for a punctuation keyword. This allows non-punctuation keywords to be used in
  22  * lists without quoting.
  23  */
  24
  25 #include "lists.h"
  26 #include "object.h"
  27 #include "parse.h"
  28
  29
  30 /*
  31  * YYSTYPE - value of a lexical token
  32  */
  33
  34 #define YYSTYPE YYSYMBOL
  35
  36 typedef struct _YYSTYPE
  37 {
  38     int          type;
  39     OBJECT     * string;
  40     PARSE      * parse;
  41     LIST       * list;
  42     int          number;
  43     OBJECT     * file;
  44     int          line;
  45     char const * keyword;
  46 } YYSTYPE;
  47
  48 extern YYSTYPE yylval;
  49
  50 void yymode( int n );
  51 void yyerror( char const * s );
  52 int yyanyerrors();
  53 void yyfparse( OBJECT * s );
  54 void yyfdone( void );
  55 void yysparse( OBJECT * name, const char * * lines );
  56 int yyline();
  57 int yylex();
  58 int yyparse();
  59 void yyinput_last_read_token( OBJECT * * name, int * line );
  60
  61 #define SCAN_NORMAL  0  /* normal parsing */
  62 #define SCAN_STRING  1  /* look only for matching } */
  63 #define SCAN_PUNCT   2  /* only punctuation keywords */